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Die-free fast casting method based on fused deposition technology

A rapid casting and fused deposition technology, applied in casting molding equipment, tools, molds, etc., can solve the problems of high production cost, high price, difficult equipment use and maintenance, etc., and achieve high precision and good flexibility.

Active Publication Date: 2016-02-17
泰州市海通资产管理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The size of the process sand box can reach 1500×750×750mm, and the layer thickness can reach 0.3mm. It can be used to manufacture large and medium-sized molds, but its disadvantages are obvious: because the resin is sprayed on the entire surface of the sand bed, after the mold is made, it is Surrounded by resin-containing sand, it will make it difficult to clean the sand when taking out the sand mold, requiring special treatment procedures, and also affects the accuracy and surface quality of the sand mold.
[0008] The above-mentioned moldless casting processes all need to use expensive large-scale special equipment, which is difficult to use and maintain, and the production cost is high. It has no advantages for the production of small castings and is not suitable for small foundry enterprises.

Method used

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  • Die-free fast casting method based on fused deposition technology
  • Die-free fast casting method based on fused deposition technology
  • Die-free fast casting method based on fused deposition technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Using this method to cast the reducer housing, the material is HT200, the outline size is 318mm×268mm×225mm, and the minimum wall thickness is 6mm.

[0039] It is a metal moldless rapid casting method, comprising the following steps:

[0040] Step 1 Preparation of Ceramic-Plastic Mixed Filament

[0041] Mix 500 mesh clay fine powder and 500 mesh ABS plastic powder evenly to obtain a mixture of clay fine powder and ABS plastic powder. In the mixture, the clay fine powder accounts for 50%, and the mixture is extruded into a diameter of 1.75 with a plastic extruder. ±0.03mm filament coil 6;

[0042] Step 2 Prepare the 3D CAD data of the casting shell

[0043] Use 3D CAD software to convert the 3D solid model of the part to be cast into a shell model and enlarge it by 1.22 times, set the sprue shell 13 and the riser shell 9 on the enlarged 3D shell model, and set the sprue shell 13 And the three-dimensional shell model data of riser shell 9 is converted into the STL data...

Embodiment 2

[0055] The pump body of the gear pump is cast by this method, and its material is cast aluminum ZL104, the outline size is 220mm×128mm×225mm, and the minimum wall thickness is 15mm.

[0056] It is a metal moldless rapid casting method, comprising the following steps:

[0057] Step 1 Preparation of Ceramic-Plastic Mixed Filament

[0058] Mix 800-mesh china clay micro-powder and 800-mesh PLA plastic powder evenly to obtain a mixture of china clay micro-powder and PLA plastic powder. In the mixture, the china clay micro-powder accounts for 65%, and use a plastic extruder to extrude the mixture into a diameter of 3 ±0.05mm filament coil 6;

[0059] Step 2 Prepare the 3D CAD data of the casting shell

[0060] Use 3D CAD software to convert the 3D solid model of the part to be cast into a shell model and enlarge it by 1.182 times, set the sprue shell 13 and the riser shell 9 on the enlarged 3D shell model, and set the sprue shell 13 And the three-dimensional shell model data of r...

Embodiment 3

[0072] The valve body is cast by this method, the material is malleable cast iron KTH300-06, the outline size is 210mm×210mm×125mm, and the minimum wall thickness is 12mm.

[0073] It is a metal moldless rapid casting method, comprising the following steps:

[0074] Step 1 Preparation of Ceramic-Plastic Mixed Filament

[0075] Mix 1200-mesh kaolin powder with 1200-mesh ABS plastic powder evenly to obtain a mixture of kaolin powder and ABS plastic powder. In the mixture, the proportion of kaolin powder is 45%. Use a plastic extruder to extrude the mixture into a diameter of 1.75 ±0.03mm filament coil 6;

[0076] Step 2 Prepare the 3D CAD data of the casting shell

[0077] Use 3D CAD software to convert the 3D solid model of the part to be cast into a shell model and enlarge it by 1.26 times, set the sprue shell 13 and the riser shell 9 on the enlarged 3D shell model, and set the sprue shell 13 And the three-dimensional shell model data of riser shell 9 is converted into the ...

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Abstract

The invention relates to a metal die-free fast casting method based on the fused deposition technology. The casting method is characterized by comprising the steps of 1, preparing mixed ceramic and plastic filamentous material; 2, preparing three-dimensional CAD data of cast shell molds; 3, printing the cast shell molds; 4, carrying out degreasing; 5, carrying out sintering; 6, pouring molten metal; 7, carrying out post-processing to obtain needed castings. The casting method has the advantages that needed equipment is simple, the cost is low, the production cycle is short, the accuracy of the castings is high and there is no need to set a draft angle or arrange a parting surface, can be used for casting formation of various kinds of metal and is especially suitable for fast casting formation of small and medium parts with complex cavities.

Description

technical field [0001] The invention relates to a metal casting method, in particular to a moldless rapid casting method based on a fused deposition process, and is especially suitable for rapid casting of medium and small metal parts with complex mold cavities. Background technique [0002] Casting technology has a history of about 6,000 years. Since it can cast various blanks with complex shapes, such as boxes, beds, frames, etc., and it has wide adaptability and can be casted with various metals commonly used in industry, so Casting remains one of the most important manufacturing techniques to this day. However, the flexibility of traditional casting technology is poor, and the molds and molds need to be redone if the structure and size of the parts change slightly, and the manufacturing of molds and molds takes a long time, and the cost of single-piece and small-batch production is high. [0003] In recent years, rapid prototyping technology has developed rapidly, and h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/02B22C9/12B22C23/00
Inventor 许中明陈学锋王鸿博朱慕洁
Owner 泰州市海通资产管理有限公司
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